Plow.



P. A. McGIRR.

PLOW.

APPLICATION FILED APR. 24. 1918.

Patented s t.24, 191a.

WITNESSES higherportion rislng nearly straight up at board 3, which upper edge is indicated at 6,

see so 1m as stich changes and modifica point and indicated a mm Fig. 2. Further m rirnn srATn-s f- PATRICK A. Meemn, F namial mmeis. i I v "I h 'riow.

1,280,057. Specification er tett r'sre't s i j'a f s -gQ24Jgif3 A lication and a rilza, 191s. Seria11i'd230i518.

To all whom it may concern: r In the drawing 1 w l a Be it known that I, PATRIGK A.MOG1RR, a Figure his a perspective view of a plow citizen of the United States, residin' at De with the attachment applied y i Kalb, in the county of Dekalb and tate of Fig. 2 i's arear face view ofthemold board 6 Illinois; have invented a new and useful with the attachment ap lied- 56 J Plow; of whieh the-followingis e specifica Fig. 3: isa section on e line-f3-3 of Fig; 2."

We do r i Fig. tisasection on the line MofFigLQ.

This invention has reference to plows, and Fig. 5 is a section on the line ii -+5? ofF-ig; 2. its" object is 'toprovide a construction where Fig. 6' is a top plan view-of theplow share:

1 by the speed 'of the low may be greatly 111- and'mold board with the attachment applied v creased "without lia 111w of throwing the to the latter. dirt over the top a of the mold board and Referring to the drawing, :there is shown which at the, increased speed will keep the a plow 1 and since the structureof the plowdirt in the 'iiurrow where it belongs and itself does not enter into the invention fur- 15 cover up weeds and trash on the ground; that than that the plow is a turning plow, j In accordance with the invention the mold there is -no neerl of any extended description" 51 boardb'f the 'plfow is carried above the nor or any detail showing thereoi. In Fig. 1

memes line of the mold board with the part there is shown a plow share 2, amold board providing the increased height extending 3 a plow beam 4 and handles 5, all-of which 2 from the front or land side edge of the mold may be of usual form; 7

board to near the" rear edge thereof, the Attached to the upper edge of the mold? thefront end and progressively curving or there is a supplemental mold board 7 extwisting tower-a thfurro w side of the plow tending from the front or land side end: 25 until at the rear end of'the high portion the of the meld board-'3 to a point-close.. tothe r w curvature has adownwa'rd trend. The. re: rear "end of the meld board. The supplesult of this is that the d-irtror sod is given mental mold board 7 may be heldtothemain a corresponding twist eau'si'ng it to fall into mold board 3 in rising relation to the latter the proper furrow without tending to pass by straps 8 on the land side faceof the mold 3 over the top of then old board. Because of? board and secured toboth the rnain and sup:

I the positive directing of the sod toward the plemental 'mol'd boa'rds by"bolts"9 or any; a furrow side he speed of plowing may be other suitable fastening devices.- greet-1y increased. The arrangement permits The'supplemental' Inbld board 7 is curved the employment at a light tractor, since the. from front to rear with its width from the 5 load imposed upon. the tractor even at the top edge 6 of the main moldb'o'ard progres 8 v increased speed is rel'a'tivelt small, and con sivel'y increasing and its curvature in the sequently the ground is not eompacted as lateral direction also progressively inoreas would occur where a heavy tractor is 'u'si'e'd. ing. vThe curvature "is such that a concave The invention will be best understood face is presented on the furrow side of the 40 from a consideration of the following ae: plow, flattened and facing outwardly at the tailed description taken in connection with front end and pronouncedly curved and ""*th e accompanying drawings forming part of overhanging at the rear end. The supplethis specification, with the understanding, mental mold board 7; therefore, at'its front however; that the invention is not confined end rises from the front edge of the mold 45 to any strict conformity with the showing of: board 3 as substantially a continuation of the drawings but maybechanged and modi the curvature of the inold board at such tions mark no material departure from the back, say about at the point represented by salient features of the invention as expressed the section l1ne 3-3, the supplemental rnold 50 in the appended claims. board rises on a curvature having a shorter trend is quite .pronou a described, to prev r sof radius than that of the rubbing face of the mold board toward the furrow side of the plow and indicated at 11 in Fig. 3. At a point still farther back, Say, about the posif tion ofjthe section: line Qjth radius of curvature of "the siippl'eni nta mold board is shortenedover the earest?" curvature at 11 in Fig'.'3,*sothat theovei hanging portion of the supplemental mold board becomes more pronounced, as indi' te a 12 infi ht- Be ause he p a efi sively bontinuihgcurvature and overhangof" the furrow-side ed mold board 7, by the time the position represented by the section line :5.,-5- of 'Figi 2"lis reached, there-is a: pronounced overhang bf the supplemental mold board and: the curvaw ture is downward, as indicated at 13 in Fig.

5. Finally at therearend .of the supple-i;

mental mold board where it-stopsa' short distance from'the rear end of the main mold board and about over the rear end .off'the plow share, the overhang; and downward need, as indicated-at 14:. in Figs. 1,2and 6. The supplemental mold board, whether made separately or in one piece withthe main mold board, is suitably curved', -asi ent the dirt from being".

thrown too far by the plow share, especially: when .the plow is .speeded.v up, and evem though the plow travels several times. faster;- than has heretofore been found feasible, the.

t: dirt is turned over and -.deliveredin proper place in the furrow. 1

rdinaryturning plows, if-driven faster? than two or three miles anhour, will throw. the dirt too far. The laterally curved over hanging supplemental ,mold. board rises, nearly straight upwardly at its forward end and then; tending outwardly from the front face ,of the mold board with increasing,- curvature .in-a lateral direction until, near; e rear end .of the mold board, the curva i ture is downward. This causes the dirt to be progressively turnedover'and deposited, within the proper furrow even .though the speed of the plow be increased from the;

previously limited .rate of two ,or, three;'

miles an hour, up to as high asten miles. an hour.- This permits plowingtobe done? by tractor and especially by a light tractor which will not readily sink into relatively;

t ground and which may draw one or two or more plows with a speed" much greater" than has heretofore been permissible with ordinary turning plows, thereby accomplishing the plowing of manyacres of ground a per day. At the same time the plowing will be more satisfactorily performed than has heretofore been accomplished with ordinaryv turning plows even though moving slowly, What is claimed is 1. In a turning plow, a mold board pro;;

ge ofzthe supplemental; I

vided with a curved mold board extension supplemental thereto and rising from the top of the mold board from a pointsubstantially coincident with the front of the mold} board to "a point approaching: but stopping short of'the rear .of 't'he'mold board, ""sfi'i'dhk'tension having a large radius of curvature Marthe-front edge of the moldbgard and a relatively small radius of curvature near the rear end ofthe moldboard and with its rear end portion curved down;

wardly; a r

2. In a turning plow, a mold board having an upward extension curving outward from the face of the mold board with progres ively increas end ofthe mold board adjacent to the .rear-v end the rear end .of-the exten the-mold board and prese face to the ground. 3. In a. plow a. mold boardhaving an upward extension. from its normal top :lineg withathe extension curved outwardly frorng the front face of. the mold boardgandovers,

' gressivel increas-g,

hanginght ame by Pr nt edge 0 the mold.-

ing amounts from the fro P iadjacent to the .rear edge;

to a-' point closely, thereof and with? sio ove ngin a nting its concave;

board to a thereof, 5-,

- ,4. An attaclnnent for the mold boards of turning plows, comprising .a. supplemental," mold board conforming to the top edge'of the main mold board and having a rogre s, sively increasing" curvature fromront tov Q51; rear, whereby the rear end of the supple; mental mold board when attached to theplow mold board overhangs the latter and; is downwardly direct'edat ts outer edge.

5. rig-supplemental mold board for the; mold boards 'of turning plows, havingla, lower edge conforming to the top edge of.105 the plow mold board and of a lengthr,apvv proaching that, of the top edge oflthe plow mold board, said supplemental mold board having a rogressively increasing curvature from ront to rearto rise upwardly at; the front end and curve downwardly at the 1 hen installed on. a plow mold rear end w Qfl 1 g". 6. In 'a turning plow provided with a' plow share and a mold board, a supple-Q1115 mental mold board ontop of themain mold, board and of a length to reach from the front or land side end of the mold board to a point over the rear end of the plow share, the supplemental mold board having a progressively increasing twist toward the furrow side from front .to rear with its front end rising throughout from the top edge of '7 [I the main mold board, said frontend having; itscurvat'ure substantially a continuation of{ the curvature of the moldboard, and the .1 supplemental moldboard at the rear end curving downwardly.

J g-curvature from thefront 80 7. In a turning plow, a moldboard pro- In testimony, that I claim the foregoing vided with a moldboard extension suppleas my own, I have hereto aflixed my signa- 10 mental theretg, said supplemental boarl'd ture in the presence of two Witnesses. havin a wi th increasing progressive y from %he front to the rear end of the plow, PATRICK MCGIRR' and being also curved laterally outward, the Witnesses: curvature thereof increasing progressively HUGH WEIGHTMAN, from the front to the rear end. JOHN OBRIEN.

Ooplu of thh patent my be obtained for flve cent: each, by addreuing the "Commissioner 0! Patel,

wuhington, II. 0." 

